to use qml:

i modified two lines of navit.xml like this:
<graphics type="qt_qpainter"/> instead of <graphics type="gtk_drawing_area"/>

<gui type="qml" enabled="yes" source="/opt/navit/share/navit/skins" icon_src="/opt/navit/share/navit/xpm/">

like this is working, for me, but not so smooth as i expected...let me know your impressions